package yukicoder;

import java.util.Scanner;

public class N49 {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String eq = sc.nextLine();
		int op = 0;
		int left_op = 0;
		int right_op = 0;
		int result = 0;
		int flag = 0;
		for(int i = 0;i < eq.length() + 1;++i){
			if(i == eq.length()){
				if(op == 1){
					left_op += right_op;
				}else if(op == 2){
					left_op *= right_op;
				}
				right_op = 0;
				break;
			}else if(eq.charAt(i) == 42){
				if(op == 1){
					left_op += right_op;
				}else if(op == 2){
					left_op *= right_op;
				}
				right_op = 0;
				op = 1; //たしざん
			}else if(eq.charAt(i) == 43){
				if(flag == 0){
					result = 1;
					flag = 1;
				}
				if(op == 1){
					left_op += right_op;
				}else if(op == 2){
					left_op *= right_op;
				}
				right_op = 0;
				op = 2; //かけざん
			}else if(op == 0){
				left_op *= 10;
				left_op += eq.charAt(i) - 48;
			}else{
				right_op *= 10;
				right_op += eq.charAt(i) - 48;
			}
		}
		
		System.out.println(left_op);
	}
}